diff --git a/elementary-statistics/.RData b/elementary-statistics/.RData
index c541a3f..2197e7d 100644
Binary files a/elementary-statistics/.RData and b/elementary-statistics/.RData differ
diff --git a/elementary-statistics/.Rhistory b/elementary-statistics/.Rhistory
index 9c3e176..742bd3f 100644
--- a/elementary-statistics/.Rhistory
+++ b/elementary-statistics/.Rhistory
@@ -316,3 +316,10 @@ intervalFn = ogive(interval_breaks, interval.freq)
 plot(intervalFn, main="Old Faithful Eruptions", xlab="Intervals in minutes", ylab="Cumulative Relative Frequency")
 plotCsum(interval)
 q()
+duration
+stem(duration)
+interval
+stem(interval)
+interval
+help(stem)
+q()